Iliotibial band syndrome (ITBS or IT Band Syndrome) is an overuse injury of the connective tissues that are located on the lateral or outer part of thigh and knee. It causes pain and tenderness in those areas, especially just above the knee joint. Iliotibial band syndrome is the most common cause of lateral knee pain in runners and bicyclists.
The iliotibial tract is classified as a deep fascia of the body, surrounding and connecting the muscles of the body to surrounding tissues. Like all other deep fascia, it is made almost exclusively of dense regular connective tissue. Dense regular connective tissue is a form of fibrous connective tissue that is extremely strong, tough, and avascular. It is made almost exclusively of collagen fibers and fibroblast cells, which produce collagen. Collagen is the strongest protein found in nature and is one of the strongest structures in the entire human body. The collagen fibers are arranged in a regular pattern of straight lines, giving the iliotibial tract incredible strength in the direction in which muscle force is applied to it and considerably less strength in other directions.
Functionally, the iliotibial tract extends the tensor fascia latae muscle into the lower thigh and leg, allowing it to function as an abductor, medial rotator and flexor of the thigh. It also allows the tensor fascia latae and gluteus maximus muscles to support the extension of the knee while standing, walking, running and biking.
Iliotibial band inflammation is an overuse syndrome that occurs most often in long-distance runners, bicyclists, and other athletes who repeatedly squat. The iliotibial band syndrome may be the result of a combination of issues, including poor training habits, poor flexibility of muscle, and other mechanical imbalances in the body, especially involving the low back, pelvis, hips, and knees
Treatment can get started as soon as you notice any discomfort.
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